La structure et l'évolution temporelle des communautés zooplanctoniques de deux bras morts de la Meuse ( «noues de Tailfer» et «noue de Waulsort») ont été suivies durant les périodes printanières et estivales 1993 et 1996 et comparées à celles du cours principal du fleuve. La composition des communautés zooplanctoniques se caractérise par une abondance plus importante de crustacés à Waulsort que dans la Meuse, alors que la structure et la densité du zooplancton dans les noues de Tailfer sont proches de celles du cours principal. Dans les noues se remarque une forte hétérogénéité spatiale de la répartition zooplanctonique, nettement influencée par les communications avec le fleuve et les facteurs hydrologiques. Temporal variation and spatial heterogeneity of zooplankton food availability in backwaters and the main channel of the River Meuse (Belgium)Keywords : backwaters, River Meuse, zooplankton, temporal heterogeneity, spatial heterogeneity.The structure the temporal evolution of zooplankton community of two backwaters of the River Meuse (the « noues de Tailfer» and the «noue de Waulsort») were monitored during spring and summer 1993 and 1996. Crustacean densities were much higher in the Waulsort than in the Tailfer backwater and the main channel of the river. Both backwaters showed a marked spatial heterogeneity of zooplanktonic densities, particularly affected by the communications with the River Meuse and the hydrologie factors.
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